Last year, Richter and Koper said tests they conducted using
earth-penetrating radar had confirmed that there was a train at the
site.
But Andrzej Gaik, a spokesman for the pair, said on Wednesday that
they had found nothing, despite an exhaustive search of three pits
costing 140,000 zlotys (£28,000).
Gaik said a smaller-scale search using probes would resume at a nearby site in September, adding: “Hope dies last.”

The dig confirmed findings by experts from a university in Kraków,
who used magnetic equipment but found no trace of train or tunnel, Gaik
said.
An armed train loaded with valuables is said to have disappeared after entering a complex of tunnels, an www.intopoland.com/what-to-see/world-war-ii/riese-complex.ht, under the Owl Mountains.